Engine Breather with supercharging

Post by **Coops** » Sat Nov 02, 2013 7:37 pm

im still up in arms over my breathers on the RV8 with the supercharger,
At present it goes to a catch can where it vents to air via a filter,
but at idle you get loads of fumes out of the filter and can smell it in the car,
any ideas what I can do to stop this????

mgbv8 · Post by **mgbv8** » Sat Nov 02, 2013 8:47 pm

Run a hose from the filter connection to under the engine bay.

kiwicar · Post by **kiwicar** » Sun Nov 03, 2013 4:08 am

Hi
put a venturi tap thingy into the exhaust, connect the out pipe of the catch can to it and send the fumes out the back of the car well past your nose.
Best regards
Mike

stevieturbo · Post by **stevieturbo** » Sun Nov 03, 2013 10:26 am

mgbv8 wrote:Run a hose from the filter connection to under the engine bay.

Basically this.

just route a hose somewhere clear of the cabin.

You can try the extractor thing, but if it is efficient, you'd need to be sure it doesnt pull any oil out too.

Eliot · Post by **Eliot** » Sun Nov 03, 2013 11:39 am

I just run a hose from the rocker covers back under the car and drops down near the gearbox.

Post by **Coops** » Sun Nov 03, 2013 12:36 pm

ah ok cheers guys,
no one bothers to plumb it back into the intake then?

stevieturbo · Post by **stevieturbo** » Sun Nov 03, 2013 3:43 pm

Coops wrote:ah ok cheers guys,
no one bothers to plumb it back into the intake then?

Whilst that is the legal route.....it isnt always the preferred route unless you can ensure there is no oil or oil mist passed.

JP. · Post by **JP.** » Sun Nov 03, 2013 4:41 pm

I run it just like it suppose to. Breather on one valve cover, flame trap - catch can - intake manifold from the other valve cover.
Run it this way on my home build supercharged V8 as well on my home build turbo charged V6.

Under boost, the flame trap closes so no suction of oil fumes into the mixture.

While cruising no oil fumes into the car like it should.

Post by **Coops** » Sun Nov 03, 2013 11:33 pm

what flame trap you using mate to close under boost?

cammmy · Post by **cammmy** » Mon Nov 04, 2013 12:15 pm

As Mike suggested:

http://www.summitracing.com/int/parts/s ... /overview/

It says for use with non muffled exhausts only but should still work on a well designed road exhaust.

JP. · Post by **JP.** » Mon Nov 04, 2013 4:20 pm

Coops wrote:what flame trap you using mate to close under boost?

That one that was on when the Cappa left the factory.
Modifiet a valve cover so it uses a Capri grommet and flametrap ( PCV valve ).
I cut of the breathing pipe on the left side cover and made a hole big enough to receive the Capri's grommet and in went the pcv valve/flame trap.